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Shaping method of water-soluble core mould of closed component made of inside grid reinforced composite material

A technology of composite materials and closed components, which is applied in the field of forming water-soluble mandrels for closed components of composite materials with inner mesh and reinforcement, can solve the problems that metal molds are difficult to realize, and achieve continuity, form difficulties, and good thermal stability. The effect of stability

Inactive Publication Date: 2010-02-17
HARBIN FRP INST
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that it is difficult to realize the closed member of the inner mesh reinforced composite material by using a metal mold, and further provide a method for forming a water-soluble mandrel of the inner mesh reinforced composite material closed member

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0011] Embodiment 1: The steps of the forming method of the water-soluble mandrel of the inner grid reinforced composite material closure member of the present embodiment are as follows:

[0012] Step 1: Configure the mandrel material: first dissolve the PVP material in water to make an aqueous solution with a concentration of 10% to 30%. After it is completely dissolved, add filler. The mass of PVP material is 1% to 15% of the mass of the filler. , and then stir evenly; the PVP material is a water-soluble polymer whose full name is polyvinylpyrrolidone;

[0013] Step 2: Preforming: Put the configured core mold material into the mold and compact it to obtain the core mold blank; the inner cavity of the mold is made into the shape of the designed core mold, which can save the machining steps; it can also be made into preform block, and then process the water-soluble mandrel into the required shape through various mechanical processing methods. During the preforming process, th...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment differs from Embodiment 1 in that the filler in step 1 includes one or more of micron-sized glass beads, silicon dioxide, aluminum oxide, titanium dioxide, and ceramic powder. The physical properties of the water-soluble mandrel material can be adjusted by controlling the adding ratio.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment is different from Embodiment 2 in that: the filler in step 1 is also added with graphite or metal powder. Improve the physical properties of the core mold material, such as thermal conductivity, thermal expansion coefficient, etc., by adding graphite or metal powder.

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Abstract

The invention discloses a shaping method of a water-soluble core mould of a closed component made of inside grid reinforced composite material, which relates a shaping method of a core mould of the closed component made of the inside grid reinforced composite material. The invention solves the problem that the closed component made of the inside grid reinforced composite material is difficult to shape by using the prior metal mould. The method comprises the following steps: firstly, dissolving PVP materials in water to prepare a water solution with the concentration of 10 to 30%, adding fillers, and stirring evenly; putting the prepared materials for the core mould in a mould and stably pressing the materials so as to obtain a core mould blank; putting the core mould blank in a baker for baking so as to distill moisture from the core mould blank; using a machining mean for processing; and uniformly applying water-soluble glue and mold release agent on the surface of the core mould. Thewater-soluble core mould made by the shaping method effectively solves the problem of difficult shaping of the closed component made of composite material. The closed component which is made of inside grid reinforced composite material and prepared by using the core mould made by the method of the invention has the fiber volume of 60 + / - 5 %, and the air clearance of less than 1%.

Description

technical field [0001] The invention relates to a forming method of a core mold of an inner grid reinforced composite material closed component. Background technique [0002] Fiber-reinforced resin-based composite components with internal grids or composite components with similar structures are characterized by internally composed of grids of different shapes, which are integrally formed with the skin, thereby ensuring the continuity of the fibers Therefore, this type of structure has high structural efficiency, light weight and high strength, and is more and more valued by the aerospace field. However, if a metal mold is used to form the closed member of the inner grid reinforced composite material, it is difficult to realize due to the difficulty of demoulding and the complex structure of the mold. Contents of the invention [0003] The object of the present invention is to solve the problem that it is difficult to realize the inner grid-reinforced composite closure me...

Claims

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Application Information

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IPC IPC(8): B29C33/38B29C70/54
Inventor 陈辉李晓丹刘永琪林再文邹志伟陈浩然迟波
Owner HARBIN FRP INST
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